I laid out some pretty basic rules. Over the course of 24 hours, you duel continuously, with breaks in between of course. A win is 10 points added to your "score", and vice versa if you lose. The top 20 or whatever it was I mentioned would be in the finals, where you have a fairly standard knockout tournament. The one who comes out on top is declared the winner.

If you wanna change the knockout to a Swiss tournament, then I don't have any objections, although I would be concerned over how much time it would take.